Dust-guard.



L. Y. WILLIAMS.

DUST GUARD.

APPLICATION FILED APR. 10. ms.

1,157,45. I Patented Jam-11,1916.

SIM/04244 06 @MWJ/ CULUMBXA PLANUGRAIII CUHWASHINGTON, n. c.

UNTTE STAE PATENT @FFTCE.

LACEY Y. WILLIAMS, OF TOLEDO, OHIO.

DUST- GUARD.

Application filed April 10, 1915.

To all whom it may concern Be it known that I, LACEY Y. WILLIAMS, a citizen of the United States, residing at Toledo, in the county of Lucas and State of Ohio, have invented certain new and useful Improvements in Dust-Guards; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

The invention appertains to dust guards, such as generically disclosed in Letters Patent issued to me on October 18, 1910, Nos. 973,462 and 973,463, and on February 13, 1912, No. 1,017 ,277, the object being to improve the guard so the wood will not split and to render the same more durable and etlicient in operation.

The invention consists in certain novelties of construction and combinations of parts as herein set forth and claimed.

The accompanying drawing illustrates a guard with the improvements embodied therein, and a modification of the spring arrangement, constructed according to one of the best modes of procedure I have so far devised for the purpose.

I have found by extended trial that the guards constructed as described in the patents mentioned warp and split in use and become inoperative to exclude dust and dirt from the journal box. Even when corrugated pieces of metal or Wood are inserted in the material of the guard upon opposite sides, or reinforcing bars are secured to each section, the splitting is not prevented, and while the pieces of metal or wood hold the separated parts from entire displacement the displacement is 'sufiicient to form openings between the bearing edge of the guard and the journal through which dirt passes to the interior of the box.

Following the expenditure of much time and money in experimental-work, I conceived of a way of curing the imperfections appertaining to the species of guards hereinbefore mentioned which consist in making each section of the guard of three layers of wood, the central layer having the grain of the wood at an angle to the grain of the other layers, and gluing, or cementing or gluing, and riveting the layers together. Further, I have found that gluing the layers together only is not sutficient, as the oil and Specification of Letters Patent.

Patented Jan. 11, 1916.

Serial No. 20,478.

moisture soak into the wood, disintegrate the glue and cause the separation of the layers within a short period of time; and I have not been able to find any glue which will withstand the action of the oil and water. The union of the several layers by rivets only is attended by fair results, but the use of both the glue or cement and the rivets has proven most satisfactory, for the rivets, when properly disposed, hold the layers of wood together, and should some oil or water penetrate the material a short distance and cause a slight separation by warping of a layer the rivets prevent any very extended displacement or extension of the deformation.

conformable to the above exposition, the improvement consists in making each of the L-shaped sections of the guard of a plurality of layers of wood riveted, or riveted and glued or cemented, together, removing part of the central layer of wood in each long arm of a section to form a recess, locating therein a guide screw eye or staple, a coiled spring acting with expansive energy, and inserting a pin through the eye or staple to hold the sections in line.

The accompanying drawing illustrates a preferred arrangement of the spring and connecting elements, and a slight modification in the location of the spring.

Figure 1 is a plan view of the guard with the sections in the relative positions they occupy before the guard is placed in the chamher at the back of the journal box, the sections being separated so the edges are in the positions indicated by the dotted lines, a full circle, when engaging the dust guard bearing of the journal; one corner of the guard being broken away so as to show one of the springs, one of the screw eyes or staples, and the pin or bar in connection with the screw eye and spring, the opposite long and short arms being provided with like elements. Fig. 2 is a section of Fig. 1 taken on line 00*00. Fig. 3 shows a slight modification of the spring arrangement.

The guard comprises two complemental L-shaped sections 1, 1, each having a long arm 2 and a short arm 3, and fashioned at one edge to have a semicircular surface l, the edges of both sections of the guard, when united. being adapted to bear against and fit the dust guard bearing surface of a journal in a well known way. Each section ofthe. guard iscut to shape from prepared composite material consisting of sheets of wood glued or cemented togcher.

5, 5 designate the two outer sheets of wood, 6, the central sheet with the grain of the wood at an angle to the grains ofthe two outer sheets,.and 7 the glue or cement. The rivets 8 are inserted to prevent the separation of the sheets when the same tend to warp upon the action of oil or water, or both, in disintegrating the .glue .or cement or dissolving the same.

Apartof-the-central sheet'6 in'each long arm is cutaway to forma recess R within which is located a coiled spring S and a guide screw-eye or staple G, as shown by Fig. 1. The guide eye or staple is screwed or driven-into the central layer6 of wood in the short arm and vis movable within the recess in the long arm upon the pin or bar 9 passed through-the recess and-eye of the staple, the pin guiding the'eye in itsmovement and preventing the separation ofthe arms. The pin or bar 9 is also preferably passed through the spring S to holdthe same against buckling or displacement and the springbears at one endzagainst the wood at the end of therecess and the other end bears against the eye of the screw eye or end of the staple, the expansive energyof the spring forcing the sections together and against the dust guard bearing of the journal. The long and .short arms at the opposite corner of the guard are united and have the same elements as indicated in dotted lines.

In Fig. 3 the pin 9 and staple or screw eye G are the same as in Fig. 1, but the spring S is located atone side of pin 9, the spring .ends 10 being coiled and encircling the pin 9 and the central part ofthe spring being held parallel with the pin by a'wire 11 loosely surrounding the same and attached to the spring so the latter will be held in place. The mode of operation is the same as with the preferred arrangement shown by Fig. 1.

The guard as thus constructed fulfils the desired requirements of relatively cheap first cost, efiectiveness in operation and durability. As before stated, the best embodiment of the invention includes the union of the several sheets by glue or cement as well as the union of the same by rivets. Obviously, the springs can be placed in the short arms of the guard and the screw eye or staple connected with the long arm, but

the preferred arrangement is that shown in Fig. 1 of the drawing.

l/Vhat I claim is:

1. A dust guard consisting of two complemental L-shaped sections, each section having a long arm and a short arm and'a semicircular bearing'edge, and the said sections oppositely disposed to each other to form a substantially circular opening; both ofsaid-sections consisting of sheets of wood with the grains of the wood angularly disposed and the sheets glued or cemented and riveted'together; each pair of adjacent long and short arms of the guard' being connected by a screw eye or staple and a pin, and a coiled spring located within a recess in one of said arms of each pair, said springs acting by expansive energy to force the said sections toward each other andagainst a journal when the guard is in use.

2. A dust guard consisting of two complemental L-shaped sections, each section having a long arm and a short arm and a semicircularbearing edge, and the said sections oppositely disposed to each other to form a substantially circular opening, both of said sections consisting of sheets of wood with the grains of the wood angularly disposed andth sheets glued or cemented and riveted together; each pair of adjacent long and short arms being united by a screw eye or staple and a pin passed'through the same, and a coiled spring located within a recess in one of said arms of each pair, surrounding the pin and bearing against the screw or staple and acting by expansive energy to force the sections together.

In'test-imony whereof I aflix my signature.

LACEY Y. WILLIAMS.

Copies of this patent may be-obtained .for fivecents each, by addressing the iGommissioner of Patents. Washington, D. G. 

